void LayerTreeHostCA::initialize()
{
// Create a root layer.
m_rootLayer = GraphicsLayer::create(graphicsLayerFactory(), this);
#ifndef NDEBUG
m_rootLayer->setName("LayerTreeHost root layer");
#endif
m_rootLayer->setDrawsContent(false);
m_rootLayer->setSize(m_webPage->size());
static_cast<GraphicsLayerCA*>(m_rootLayer.get())->platformCALayer()->setGeometryFlipped(true);
m_nonCompositedContentLayer = GraphicsLayer::create(graphicsLayerFactory(), this);
static_cast<GraphicsLayerCA*>(m_nonCompositedContentLayer.get())->setAllowTiledLayer(false);
#ifndef NDEBUG
m_nonCompositedContentLayer->setName("LayerTreeHost non-composited content");
#endif
m_nonCompositedContentLayer->setDrawsContent(true);
m_nonCompositedContentLayer->setContentsOpaque(m_webPage->drawsBackground() && !m_webPage->drawsTransparentBackground());
m_nonCompositedContentLayer->setSize(m_webPage->size());
if (m_webPage->corePage()->settings()->acceleratedDrawingEnabled())
m_nonCompositedContentLayer->setAcceleratesDrawing(true);
m_rootLayer->addChild(m_nonCompositedContentLayer.get());
if (m_webPage->hasPageOverlay())
createPageOverlayLayer();
platformInitialize();
setLayerFlushSchedulingEnabled(!m_webPage->drawingArea() || !m_webPage->drawingArea()->layerTreeStateIsFrozen());
scheduleLayerFlush();
}
void LayerTreeHostCAWin::setRootCompositingLayer(GraphicsLayer* graphicsLayer)
{
// Don't flush any changes when we don't have a root layer. This will prevent flashes of white
// when switching out of compositing mode.
setLayerFlushSchedulingEnabled(graphicsLayer);
// Resubmit all existing animations. CACF does not remember running animations
// When the layer tree is removed and then added back to the hierarchy
if (graphicsLayer)
static_cast<GraphicsLayerCA*>(graphicsLayer)->platformCALayer()->ensureAnimationsSubmitted();
LayerTreeHostCA::setRootCompositingLayer(graphicsLayer);
}
